11 



Thalictrum polygamum, T. pnrpurascens, Ranunculus Cymbalaria, 

 It. abortivus, H. sceleratus, ft. septentrionalis, Ii. macro nil/ us, R. 



acris. Aquilegia Canadensis, Delphinium datum. Geranium macu- 

 latuni. G. Richardsoni, Baptism tinctoria. Thermopsis rnontana. 

 Lupin us parvifloruSj L, perennis, Trifoliurn longipes, T. involu- 

 cratinn. T. rnonanthuin. Psoralea floribunda. Astragalus earyo- 

 <-arpus, A. Canadensis, A. multiflorus, A. decumbens, A. junceus. 

 A. tripltyUus, Oxytropis Larnberti, Latliyrus polymorphus, L. 

 rc'DOMix. Pixinn sat i cum. Phaseolus perennis. P. helvolus. Amplii- 

 earpcea monoica, Desmanthus brachylobus, Amelanchier 

 (Enothera biennis, CE. sinnata, (E. albicaulis. 



The form on Cleinati* is referred bv authoi's to E. 







(Wallr.), or as often written, E. tort His, Link. It seems a mistake to 

 separate it from the other forms occurring on RanunculacecR, some 

 of which have equally long appendages: especially as on Clematis, 

 these are radiant and more or less interwoven with the mycelium, as 

 is usual in E. communi*. while in European specimens of E. tort Hi* 

 on Cornus (Rabh. Fungi Europ. Xo. 2033, J. Kunze, Fungi Selecti 

 Exsicc, Xo. 577. etc.). the iipjicndauvs are fasciculate and a<siirs:ent. 

 (See also Tuhisnc. Scl. Fung. Carp. I, pp. 213-216). 



The forms on JLeguminosce, etc., are often referred to E. Martii , 

 Lev. De Bary (]\Iurph. und Phys. dor Pilze, III. p. 40) and Tulasne 

 (1. c. p. 215) agree in considering this a synonym of E. communis, 

 Winter, however, (Die Pilze, II, p. 31) retains E. Martii and refers 

 to it all forms having hyaline appendages; but he says that he cannot 

 deride whether this character is alwavs constant and sufficient for their 



- 



separation. Careful examination and comparison of the herbarium 

 specimens specially mentioned by Winter, show that this character is 

 not constant, for some of those given by him under E ' . Martii have 

 distinctly colored appendages, while in some of those given under 

 E. communis they are very slightly, if at all, colored. In fact the 

 coloring of the appendages seems to depend to a considerable extent 

 on the age and vigor of the specimen, being light colored or hyaline in 

 the young, and often quite dark in fully matured, vigorous specimens. 

 A portion, at least, of the appendages often remains hyaline of those 

 on Leguminosce, while in the case of those on Ranunculacem, they 

 are usually all quite dark. 



E. tortilis, (Wallr.) 



Alphitomorpha tortilis, Wallr. Verhandl Nat. Freunde, I, p. 31. 

 Erysibe tortilis, I,ink, Sp. Plant. VI, part I, p. 3. 

 Rrysiphe Corni, Duby Botan. Gall. II, p. 870. 

 E) ysiphe tortilis, Fries Syst. Mj'C. Ill, p. 243. 



Hypophyllotis. Mycelium arachnoid, effuse, evanescent. Peri- 

 thecia scattered, 80-100 : appendages not numerous, about 8-15. 

 dark colored, flexuons, verv lona-, 10-14 times the diameter of the 



' / <T7 t 



